XML 70 R12.htm IDEA: XBRL DOCUMENT
v2.4.0.8

EQUIPMENT LINE | 12 Months Ended
--- | ---
Dec. 31, 2013
EQUIPMENT LINE |
EQUIPMENT LINE | 5. EQUIPMENT LINE In 2009, we renewed our equipment financing facility and had approximately $500,000 available for borrowing as of December 31, 2013 and 2012. This facility is secured by a certificate of deposit. Any outstanding principal balance bears a fixed interest rate equal to one and one-half percentage points above the Prime Rate. No amounts were due under this facility as of December 31, 2013 and 2012.

X
- Definition The entire disclosure for line of credit facility. + References No definition available. + Details
Name: | gern_LineOfCreditFacilityDescriptionTextBlock
Namespace Prefix: | gern_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration